After half a day of play the PS4 has exceeded my expectations by quite a bit. I had issues with PS+ at first too but they quickly resolved themselves, like 10 minutes after my first attempt everything was working fine and I was able to download Resogun and Contrast and Warframe, only played Resogun of those titles. It is an awesome Defender-alike.
Also bought (on disc to take advantage of various sales):
Killzone - much better than I expected once you get past the lame and predictable semi-interactive intro level. The story already doesn’t make a lot of sense but the shooting is fun. Haven’t tried MP yet.
Lego Marvel - typical fun lego theme game, best played co-op
Knack - pretty great, not sure why the reviews of this were so bad, maybe it peters out later but the first few chapters are great 3D platformer fun.
Assassins Creed 4 - pretty much what you’d expect, looks pretty on the new system
NFS Rivals - so far, so good. Burnout style arcade racing, looks very nice
The remote play stuff is really cool, especially the games like Knack and NFS Rivals where you can use the Vita as a second screen for 2 players. PS4 + Vita takes a huge bite out of what makes the Wii U special, relegating Nintendo hardware once again to something you get solely because you want to play Nintendo’s 1st party titles (granted, PS4+Vita == $560, which is significantly more than a Wii U, so there’s that too).
The UI might not be much different than what was on the PS3, but unlike some other reviews I’ve read, I prefer it to PS3 quite a bit. It is a lot more logically laid out, IMO, and it is very responsive when switching into the UI from a game. The real-time broadcasting and clip sharing stuff is super cool and Just Worked for me.
PS4 controller is, as most agree, a huge improvement. It doesn’t cramp my hands the way the PS3 one would after an hour or so of play, already feels pretty natural to me.
A+++ would next-gen again. Going to be super awesome once the big games like Watch Dogs, Destiny, whatever Naughty Dog and MM are working on are available.